Mandala 4, Hymn 28, Verse 1
त्वा यु॒जा तव॒ तत्सो॑म स॒ख्य इन्द्रो॑ अ॒पो मन॑वे स॒स्रुत॑स्कः अह॒न्नहि॒मरि॑णात्स॒प्त सिन्धू॒नपा॑वृणो॒दपि॑हितेव॒ खानि॑
"ALLIED with thee, in this thy friendship, Soma, Indra for man made waters flow together, Slew Ahi, and sent forth the Seven Rivers, and opened as it were obstructed fountains."